摘要
在有机肥和氮肥配施条件下,设置不同有机肥和氮肥的施肥梯度,研究了小麦各生育期土壤氧化还原酶活性(包括过氧化氢酶、脱氢酶和多酚氧化酶活性)的动态变化趋势。结果表明,与单施有机肥或单施氮肥相比,有机肥和氮肥配施条件下,土壤过氧化氢酶和脱氢酶活性均有明显提高。在有机肥用量22500kg/hm2、氮肥用量120kg/hm2条件下,土壤过氧化氢酶和脱氢酶活性均达到最高,分别为1.1750ml/(g.20min)和15.7931ug/(g.d)。但是,随着肥料的施加,土壤多酚氧化酶活性降低,当有机肥用量和氮肥用量达到最大时,多酚氧化酶活性降至最低。
Under the different conditions of organic manure and nitrogen fertilizer,the dynamic change trend of soil oxidoreductases activities is studied.Results showed that compared with organic fertilizer or N fertilizer,soil catalase and dehydrogenase activities significantly increased under organic and N fertilizer conditions.With organic fertilizer of 22 500 kg/hm2 and N fertilizer of 120 kg/hm2,the activities of soil catalase and dehydrogenase were highest,being 1.175 0 〔0.1 ml/（g·20 min）〕 and 15.793 1 ug/（g·d）,respectively.Soil polyphenol oxidase activity decreased with the increase in the amount of organic and nitrogen fertilizer.
出处
《水土保持通报》
CSCD
北大核心
2010年第6期12-16,共5页
Bulletin of Soil and Water Conservation
基金
国家自然科学基金(40771109
40871119)
国家科技支撑计划(2007BAD89B16
2008BADA4B09)
关键词
氧化还原酶
有机肥
氮肥
小麦生长期
oxidoreductases
organic manure
nitrogen fertilizer
growth of wheat
